Electrical system and electrical drive unit

Abstract

An electrical system with optimised heat dissipation and an electrical drive unit having the electrical system is disclosed. The electrical system has a bus bar, a housing element, and a heat-conducting element which contacts the bus bar in a thermally conductive manner. At least part of the housing element includes, on a side facing the bus bar, a shaped element which projects from an outer extension plane and forms a contact surface against which the heat-conducting element ( 40 ) bears in a thermally conductive manner.

1 . An electrical system, comprising
 a bus bar,   a housing element, and   a heat-conducting element which contacts the bus bar in a thermally conductive manner, wherein at least part of the housing element comprising, on a side facing the bus bar, a shaped element which projects from an outer extension plane and forms a contact surface against which the heat-conducting element bears in a thermally conductive manner.   
     
     
         2 . The electrical system according to  claim 1 , wherein the heat-conducting element is shaped three-dimensionally. 
     
     
         3 . The electrical system according to  claim 1 , wherein the housing element comprises a material which has a thermal conductivity of at least 40 W/mk. 
     
     
         4 . The electrical system according to  claim 1 , wherein the heat-conducting element comprises a material which has a thermal conductivity of at least 3 W/mK. 
     
     
         5 . The electrical system according to  claim 1 , wherein a distance between the bus bar and the contact surface of the projecting shaped element is a maximum of 3 mm. 
     
     
         6 . The electrical system according to  claim 1 , wherein the heat-conducting element bears with at least one protrusion element against an outer side surface of the projecting shaped element. 
     
     
         7 . The electrical system according to  claim 1 , wherein the projecting shaped element is designed with a cavity which is open on the side facing the bus bar. 
     
     
         8 . The electrical system according to  claim 7 , wherein the heat-conducting element bears with at least one protrusion element against an inner side surface of the projecting shaped element, which delimits the cavity 
     
     
         9 . The electrical system according to  claim 1 , further comprising a converter, and wherein the housing element is a part of a housing of the converter. 
     
     
         10 . An electrical drive unit, comprising at least one electrical rotary machine and a power electronics system for controlling and/or supplying current to the electrical rotary machine, and an electrical system according to  claim 1  as a component of the power electronics system.